1. burst inwards.   Hint First letter clue   2. cut the tip off.   First letter clue   3. collide with or dash against.   First letter clue   4. put into effect.   First letter clue   5. mean or insinuate.   First letter clue   6. handle or control craftily.   First letter clue   7. pierce or make hole(s) in.   First letter clue